Unit 4 Topic 5

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Phosphorylation
Adding phosphate to a molecule --- ADP + Pi = ATP.
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Photophosphorylation
Adding phosphate to a molecule using light.
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Photolysis
The splitting of a molecule using light energy.
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Hydrolysis
The splitting of a molecule using water.
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Redox Reactions
Reactions that involve oxidation and reduction.
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Oxidation
Electrons are lost.
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Reduction
Electrons are gained.
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Coenzyme
A molecule that aids the function of an enzyme.
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Ecosystem
All the organisms living in a particular area and all the abiotic factors.
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Trophic Levels
Each stage - producer
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Gross Primary Productivity - GPP
The rate at which energy is incorporated into organic molecules by an ecosystem.
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Net Primary Productivity - NPP
The rate at which energy transferred into the organic molecules that make up the new plant biomass.
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NPP = GPP - R
R = plant respiration.
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Habitat
When an organism lives.
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Population
All the organisms of one species in a habitat.
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Population Size
The number of individuals of one species in a particular area.
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Community
Populations of different species in a habitat make up a community.
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Abiotic Factors
The non-living features of the ecosystem - e.g. temperature.
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Biotic Factors
The living features of the ecosystem - e.g. presence of predators.
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Abundance
The number of individuals of one species in a particular area (same as population size).
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Distribution
Where a species is within a particular area.
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Interspecific Competition
Competition between different species.
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Intraspecific Competition
Competition within a species.
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Niche
The role of a species within its habitat.
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Succession
The process by which an ecosystem changes over time.
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Pioneer Species
The first species to colonise an area when succession occurs.
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Climax Community
The ecosystem is supporting the largest and most complex community of plants and animals it can - it won't change much more.
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Global Warming
The rapid increase in global temperature over the last century.
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Dendrochronology
The study of tree rings.
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Gene Pool
The complete range of alleles present in a population.
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Allele Frequency
How often an allele occurs in a population.
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Evolution
The frequency of an allele in a population changes over time.
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Speciation
The development of new species.
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Species
A group of organisms that can breed together to produce fertile offspring.
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Reproductive Isolation
Changes in allele frequencies cause changes in phenotype that mean populations of the same species can no longer breed together to produce fertile offspring.
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Other cards in this set

Card 2

Front

Adding phosphate to a molecule using light.

Back

Photophosphorylation

Card 3

Front

The splitting of a molecule using light energy.

Back

Preview of the back of card 3

Card 4

Front

The splitting of a molecule using water.

Back

Preview of the back of card 4

Card 5

Front

Reactions that involve oxidation and reduction.

Back

Preview of the back of card 5
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